β-Sialon:Eu phosphor-in-glass: a robust green color converter for high power blue laser lighting
β-Sialon:Eu phosphor-in-glass: a robust green color converter for high power blue laser lighting
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DOI：
10.1039/c5tc02236c
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发表时间：
2015-10
影响因子：
6.4
通讯作者：
Qiang-Qiang Zhu-Qiang;Xiaojun Wang;Le Wang;N. Hirosaki;T. Nishimura;Zifeng Tian;Qian Li;Yan-Zheng Xu
中科院分区：
文献类型：
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作者：
Qiang-Qiang Zhu-Qiang;Xiaojun Wang;Le Wang;N. Hirosaki;T. Nishimura;Zifeng Tian;Qian Li;Yan-Zheng Xu
固态激光照明在亮度，效率和色域方面优于白光发光二极管，这需要热鲁棒的颜色转换器，可以忍受高功率蓝色激光照射。因此，块状玻璃内磷（PiG）发光材料的应用前景广阔。在这里，我们报告了一种绿色发光的PiG材料，通过β-Sialon:Eu荧光粉与ZnO-B2O3-BaO-Al2O3玻璃熔块在630-660°C下在空气中共烧20-80分钟。研究了β-Sialon:Eu PiG材料的微观结构、光致发光光谱、量子效率、透光率和热猝灭性能。显微结构分析表明，β-Sialon:Eu荧光粉均匀分散在玻璃基体中，无界面反应。材料的发光效率和透明度在很大程度上取决于荧光粉浓度、烧成温度和停留时间。在蓝色激光激发下，当蓝色激光的光通量密度小于0.7 W mm−2时，优化后的PiG样品的光通量与入射激光功率呈线性关系，表明其在固体激光照明中的潜在应用。
Solid state laser lighting is superior to white light-emitting diodes in brightness, efficiency and color gamut, which require thermally robust color converters that can be endured by high power blue laser irradiation. Due to this, the application of bulk phosphor-in-glass (PiG) luminescent materials could be of great interest. Here, we report a green-emitting PiG material by co-firing β-Sialon:Eu phosphor powders with the ZnO–B2O3–BaO–Al2O3 glass frits at 630–660 °C for 20–80 min in air. The microstructure, photoluminescence spectra, quantum efficiency, transmittance and thermal quenching of the β-Sialon:Eu PiG materials were investigated. The microstructural analysis indicated that β-Sialon:Eu phosphor powders were uniformly dispersed in the glass matrix without any interfacial reactions. The luminescence efficiency and transparency of the PiG materials were largely dependent on the phosphor concentration, firing temperature and dwell time. Under the blue laser excitation, the optimized PiG sample consisting of 5 wt% β-Sialon:Eu showed a linear relationship between the luminous flux and the incident laser power when the blue laser flux density was below 0.7 W mm−2, indicating its potential applications in solid state laser lighting.